Top Mariners pitching prospect George Kirby to debut vs Rays on Sunday

May 7, 2022, 10:52 AM | Updated: 3:06 pm
Mariners general hat glove...
A glove sits in the Mariners dugout before a game in Anaheim, Calif., in September 2021. (Photo by John McCoy/Getty Images)
(Photo by John McCoy/Getty Images)

The Mariners will be turning to one of the best prospects in baseball to help with the rotation as the team will be calling up right hander George Kirby to make his MLB debut this weekend.

Is Mariners’ J.P. Crawford truly making a leap at the plate?

Seattle is in need of a fifth starting pitcher after the team demoted rookie Matt Brash after he struggled mightily to begin the 2022 season. Brash not only was optioned to Triple-A Tacoma, but he will begin a move to the bullpen, potentially for the rest of the season.

Kirby is starting Sunday against the Tampa Bay Rays, manager Scott Servais announced Saturday morning. That is notable because Brash’s next turn in the rotation was scheduled for Monday against the Philadelphia Phillies. As a result, Chris Flexen will pitch Monday instead of Sunday as initially scheduled.

Kirby, 24, is Baseball America’s No. 11 prospect in baseball and MLB Pipeline’s No. 30 prospect. Baseball America rates Kirby as Seattle’s No. 2 prospect while he’s No. 3 on MLB Pipeline’s list for the Mariners.

Kirby was the 20th overall pick in the 2019 MLB Draft after a standout collegiate career for Elon University, where he showcased elite command, striking out 107 batters while walking just six over 88 1/3 innings during his junior season.

The young right hander pitched just 23 innings as a pro in 2019, striking out 25 while not walking any batters. But due to the COVID-19 pandemic, Kirby was relegated to Seattle’s alternative training site for year as there was no minor league season.

With reports of increased velocity and better secondary offerings, Kirby started to shoot up prospect ranking lists ahead of the 2021 season.

In 2021, Kirby backed up those rankings by pitching very well between High-A Everett and Double-A Arkansas. Overall, Kirby pitched 67 2/3 innings in 2021 with a 2.53 ERA and striking out 80 to 15 walks.

Kirby entered 2022 spring training as one of three top candidates for Seattle’s fifth starting spot along with Brash and Justus Sheffield. Brash won out after a stellar spring while Kirby posted a 7.04 ERA in three appearances and started the year in Double-A.

While with the Travelers, Kirby has made five starts and has compiled 24 2/3 innings while posting a 1.82 ERA and striking out 32 to just five walks. You can see some highlights from a recent start at this link.

Baseball America and MLB Pipeline give Kirby a 70 grade on the 20-80 scale (50 being average) for his fastball, which sits in the mid-to-high 90s and can touch triple digits. Both sites give him excellent grades for his control as well. Pipeline grades Kirby’s control at well above-average at 65 while Baseball America gives Kirby a top-of-the-scale 80 grade for his command.

In addition to his excellent fastball and command, Kirby throws a slider, changeup and curveball. Baseball America rates the slider as a plus pitch with a 60 grade while giving his curveball an above-average 55 grade and his changeup an average 50 grade. MLB Pipeline rates all three of Kirby’s secondary offerings as above average at 55.

Other Mariners news

Catcher Tom Murphy left Friday’s loss to the Rays with a dislocated left shoulder and he was placed on the 10-day injured list Saturday morning. Taking his place is fellow catcher Cal Raleigh, who was demoted recently after struggling at the MLB level to start the year. Raleigh hit .286 with three extra-base hits in eight games in Triple-A, including four multi-hit games over Tacoma’s last five games.

Drayer: Mariners’ Kelenic is scuffling, but still in good place to take step forward

Date Starting Pitcher
Wednesday, March 22 @ 6:40 pm

Seattle Mariners

Mariners Julio Rodríguez...
Brent Stecker

Mariners’ Dipoto: Young star Julio Rodríguez in his ‘element’ in growing spotlight

"I guess what I will always go back to with Julio is he's grounded," Mariners president of baseball operations Jerry Dipoto told Wyman and Bob.
1 day ago
Mariners Harry Ford...
Brandon Gustafson

Top Mariners prospect Harry Ford shares highlights from memorable WBC

Top Mariners prospect Harry Ford joined Wyman & Bob to discuss his experience playing in the World Baseball Classic and much more.
1 day ago
Mariners Logan Gilbert...
Shannon Drayer

Mariners Notebook: Gilbert shines; updates on dings and dents

Logan Gilbert had his best outing of the spring, while the bumps and bruises of Mariners camp are starting to pile up. Shannon Drayer has the details.
2 days ago
Mariners Jarred Kelenic...
Brent Stecker

Mariners Spring Training: Aaron Goldsmith breaks down 3 M’s standouts

Mariners broadcaster Aaron Goldsmith shared his observations on Jarred Kelenic, Robbie Ray and Cooper Hummel with Bump and Stacy.
2 days ago
Mariners Robbie Ray...
Shannon Drayer

Mariners Notebook: Kelenic catches up to deGrom, Ray impresses again

Shannon Drayer details why the Mariners Radio Network team called an audible Sunday and what they saw from the M's against Jacob deGrom in Surprise.
3 days ago
Mariners Padres Fernando Tatís Jr....
Brent Stecker

Could Mariners be eventual trade match for Padres’ Fernando Tatís Jr?

MLB Network's Greg Amsinger explained on Seattle Sports' Wyman and Bob why he thinks the Mariners could be a fit for a Fernando Tatís Jr. trade.
3 days ago
Top Mariners pitching prospect George Kirby to debut vs Rays on Sunday